Footage has very recently showed up online showing two of the greatest minds in film and music hard at work. The behind-the-scenes video captures a brief moment in time between long-term collaborators, director Steven Spielberg and composer John Williams.

This year marks 30 years since the film was released. What is now a staple of modern film, ET is being re-released in a Blue Ray format. The footage is set to feature on the release, with a whole stack of other gems.

As you can see, the two are scoring music for Elliot. What’s interesting is just how much goes into the music. You can hear the pair discussing all sorts of factors that should effect the tone and tempo of the composition.